dear xixing:
It is sad and shameful to say that I used to play mechanically, didn't realize what music is. After years of practicing in that way, it is difficult to change. To play "musically" becomes even tougher as my listening skill is really poor.
Though, I'm trying.
i think that almost everyone has this challenge in some point. it should be a commmitment of every teacher, but that's far from what actually happens. thus, there is one day that you realize: what is music if not...er...music?
do you know plato's allegory of the cave? well, without pushing it too far, that's what happens. so, you really need some time to get acquainted with this way of playing.
Am I right?
... If yes, then the dynamics really adds a lot more difficulty on the fugue.
Regards.
yes, you are. at least, that's the way i understand the whole stuff. notice that there a lot more than dynamics: try to play all voices at the same volume, and distinguish one of them only by a strong articulation (let's say, play staccato only the tenor). it makes the voice stand in the front, does it not? then, you have dynamics, agogics, articulation, touch and every possible combination. of course, it can easily led to disaster, but experimenting is fundamental, even if sometimes you end up with a complete mess...
it makes me remember a master class with a brilliant pianist, mrs. tali morgulis. she was talking about a work by liszt, with a passage where the right hand played chords, all of them three notes. so, she played the passage in several versions: with the top voice proeminent, then with the middle voice, then the lower one and, finally, with three equal voices. it's astonishing to listen and notice the difference. a single phrase can mean different things. if you telescope this notion to a whole fugue, well, you really have a long, long term of study and sound research, until you reach your own voice, so to speak.
to myself, that's what really makes me play everyday, hours a day. to play more complex stuff or to play fast are two little pieces of the puzzle: to play a single fugue with real personality...that's a challenge!
best!